It's not love.
It's not like he actually cares, or worries, or loves you truly.
It's temporary. It's not real.
He said he liked you, not loved you. He told you that he would do this for you, not anything. He never said he would give his life for you, he said he would take a bullet for you.
Wake up!
He doesn't actually love you.
One day in the future you'll just be one of the girlfriends he had, you'll be that high school crush, that girl, the one of hundreds of others.
Oh please, don't be stupid.
You aren't the only one he loves.
I'm sorry.